#frac {
    margin: auto auto;
    text-align: center;
}

.round,
.sign,
.fraction {
  background: darksalmon;
  border: solid sandybrown 1px;
  padding: 5px 5px;
  color: snow;
  font-weight: bolder;
  font-size: 1.3em;
}

.sign {
  background: coral;
  border: solid darkkhaki 1px;
}

.fraction {
  background: burlywood;
  border: solid salmon 1px;
}

input {
  padding: 5px 5px;
  margin: 10px 15px;
  background-color: #fafafa;
  color: #545454;
  border-radius: 5px 5px;
}

#frac-out,
.frac-line {
  margin: 15px 0;
}
